CN110469510B

CN110469510B - Compressor

Info

Publication number: CN110469510B
Application number: CN201810449284.0A
Authority: CN
Inventors: 杨贝; 谢郦卿; 黄之敏
Original assignee: Shanghai Highly Electrical Appliances Co Ltd
Current assignee: Shanghai Highly Electrical Appliances Co Ltd
Priority date: 2018-05-11
Filing date: 2018-05-11
Publication date: 2021-11-09
Anticipated expiration: 2038-05-11
Also published as: CN110469510A

Abstract

The invention relates to the technical field of mechanical devices, in particular to a compressor. The compressor comprises at least one cylinder with an injection hole, an injection pipe and a filling channel communicated with the injection hole and the injection pipe, and further comprises a filling device arranged in the filling channel, wherein the filling device comprises an on-off element and a sealing body, the on-off element is used for enabling the injection hole and the injection pipe to be communicated or blocked, the sealing body is connected with the on-off element, and one end of the sealing body, which is close to the injection hole, is arranged. The invention adopts the design mode that the filling device is vertical to the injection hole on the cylinder, skillfully avoids the impact of the refrigerant on the spring in the filling device, effectively prolongs the service life of the filling device, and improves the stability and reliability of the enhanced vapor injection compressor in the aspects of preventing the backflow of the refrigerant, injecting air and the like.

Description

Compressor

Technical Field

The invention relates to the technical field of mechanical devices, in particular to a compressor.

Background

The enhanced vapor injection compressor can effectively improve the low-temperature heating capacity of an air conditioner and a heat pump system, and particularly can ensure that the compressor stably operates at a lower ambient temperature and greatly improve the heating capacity when being used as the heat pump system, so that the performance and the reliability of the enhanced vapor injection compressor are concerned. The injection enthalpy-increasing compressor injects a gaseous refrigerant into a compression cavity after the refrigerant from a condenser is subcooled by an economizer or a flash evaporator, but the compression cavity of the compressor is communicated with a system, and the change of the compression cavity of the compressor is large, when the pressure of the compression cavity is greater than the injection pressure, the refrigerant in the cavity of the compressor possibly flows back to the system along with an injection loop, and the improvement of the system performance is greatly influenced.

Chinese patent application ZL201410464803.2 discloses a refrigerant filling device for injecting a refrigerant into a compression cavity of a rotary compressor, the refrigerant filling device includes an injection pipe and a slider located inside the injection pipe, and the slider is mounted on a cylinder, a main bearing, an auxiliary bearing or an intermediate plate of the rotary compressor through a spring; when the sliding block compresses the spring under the action of forward pressure, the injection port on the cylinder, the main bearing, the auxiliary bearing or the middle plate is exposed, and the refrigerant is normally injected through the injection port; when the pressure in the compression cavity of the rotary compressor is higher, the sliding block blocks and seals the injection port, the structure has a larger hidden danger in reliability, namely, the injection port faces the spring, when the pressure in the compression cavity of the rotary compressor is higher, the backflow gas of the compression cavity directly strikes on the spring, and the spring is a compression spring and has low strength for resisting transverse damage, so that the spring is easy to break, and the whole injection system has a larger hidden danger.

Disclosure of Invention

The invention aims to provide a compressor to solve the problems that a spring in a check valve is easy to damage and the check valve needs to be frequently replaced in the conventional injection control check valve.

In order to solve the technical problems, the invention provides a compressor with a charging device, which has high stability, is not easy to damage and can avoid the impact of a spring, and the technical scheme is as follows:

the utility model provides a compressor, includes at least one cylinder and the injection pipe that has the jet orifice, and a intercommunication the jet orifice with the notes passageway of injection pipe, the compressor is still including setting up in annotate the filling device in the passageway, annotate the filling device including one be used for making between jet orifice and the injection pipe intercommunication or the break-make component that blocks, and one with the seal that the break-make component is connected, the seal is close to the one end setting of jet orifice, and be used for sealing it keeps away from to annotate the passageway the one end of injection pipe.

Further, the filling channel is arranged in the cylinder along the height direction of the cylinder, one end of the injection hole is communicated with the filling channel, and the other end of the injection hole is communicated with the compression cavity of the cylinder.

Furthermore, the filling channel comprises a filling hole and a refrigerant channel, the extending direction of the filling hole is the same as that of the refrigerant channel, and the filling hole is connected with the side wall between the refrigerant channels;

the refrigerant channel is communicated with the injection pipe and the injection hole through the filling hole, and the filling device is arranged in the filling hole and used for controlling the on-off of the refrigerant channel so as to enable the injection hole and the injection pipe to be communicated or blocked;

one end of the sealing body seals one end of the filling hole and one end of the refrigerant channel, the other end of the sealing body is positioned in the filling hole, and the other end of the sealing body is connected with the on-off element;

the other end of the filling hole is communicated with the injection pipe, and the side wall of the refrigerant channel is communicated with the injection hole.

Further, the refrigerant channel comprises a first channel and a second channel, the first channel and the second channel are oppositely arranged on the side surface of the filling hole, and the side wall of the first channel is communicated with the injection hole.

Further, a communication hole is formed between the injection pipe and the other end of the filling hole, and is used for communicating the other end of the filling hole with the injection pipe.

Further, the diameter of the communication hole is smaller than the diameter of the filling hole.

Optionally, the sealing body and the filling channel are in interference connection.

Optionally, the sealing body is in threaded sealing connection with the filling channel.

Furthermore, the on-off element comprises a valve core and an elastic element, the valve core is connected to one end of the elastic element, the other end of the elastic element is connected with the other end of the sealing body, and the valve core can move along the filling channel to enable the injection hole and the injection pipe to be communicated or blocked.

Furthermore, a concave hole is formed in the valve element, and one end of the elastic element is arranged in the concave hole.

Furthermore, the linear direction formed by the sealing body, the elastic element and the valve core is vertical to the extending direction of the injection hole in sequence.

Further, the elastic element is a spring.

Compared with the prior art, the invention has the advantages that:

the invention adopts the design mode that the filling device is vertical to the injection hole on the cylinder, skillfully avoids the impact of the refrigerant on the spring in the filling device, effectively prolongs the service life of the filling device, and improves the stability and reliability of the enhanced vapor injection compressor in the aspects of preventing the backflow of the refrigerant, injecting air and the like.

Drawings

FIG. 1 is a schematic view of a portion of a compressor equipped with a charging device according to an embodiment of the present invention;

fig. 2 is a schematic diagram of the position relationship between the conventional gas lance and the cylinder.

Fig. 3 is a longitudinal sectional structural view of the sealing stopper.

Fig. 4 is a partial structural view of the filling device in a symmetrical arrangement in an up-down configuration according to an embodiment of the present invention.

FIG. 5 is a top view of a fill channel provided by an embodiment of the present invention.

Fig. 6 is a schematic view of a connection structure of the filling passage and the injection hole provided in the embodiment of the present invention.

Detailed Description

As mentioned above, the enhanced vapor injection compressor has a large change in the pressure environment of the compression chamber of the cylinder, when the pressure in the compression chamber is greater than the pressure of the refrigerant injected by the injection pipe, the refrigerant in the compression chamber may flow back to the injection system along with the injection pipeline, and the performance of the injection system is greatly affected. In order to improve the stability of the back flow prevention effect of the gas injection enthalpy compressor connected with the check valve, many schemes have been proposed, however, the schemes are proposed based on changing the materials of the check valve and the spring, the spring cannot be prevented from being directly impacted, and finally the stability of the back flow prevention effect of the gas injection enthalpy compressor cannot be improved. The invention effectively improves the stability of the effect of preventing the refrigerant from flowing back of the enhanced vapor injection compressor by changing the structure of the cylinder inside the enhanced vapor injection compressor.

The compressor according to the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

Referring to fig. 1 to 6, the present embodiment discloses a compressor 1, including at least one cylinder 10 with an injection hole 11, an injection pipe 12, and a filling channel 13 communicating the injection hole 11 and the injection pipe 12, where the compressor 1 further includes a filling device 2 disposed in the filling channel 13 for improving stability of an effect of preventing backflow of a refrigerant, where the compressor 1 is an enhanced vapor injection compressor capable of enhancing vapor injection, and the filling device 2 needs to perform an on-off function between the injection hole 11 and the injection pipe 12 to prevent backflow of the refrigerant, so that the filling device 2 includes an on-off element for enabling communication or blocking between the injection hole 11 and the injection pipe 12, and a sealing body 21 connected to the on-off element, where the sealing body 21 is disposed near one end of the injection hole 11 and is used to seal one end of the filling channel far from the injection pipe, the on-off element can realize the communication or the closing between the injection hole 11 and the injection pipe 12 under the action of air pressure; according to the characteristics of the enhanced vapor injection compressor, a gas (hereinafter referred to as a refrigerant) having a cooling effect is generally injected from the injection pipe 12, the on-off element communicates the injection hole and the injection pipe under the action of pressure generated by the refrigerant, and the refrigerant enters the compression cavity of the compressor 1 through the injection hole 11.

The filling channel 13 may include a filling hole 131 and a refrigerant channel 132, an extending direction of the filling hole 131 is the same as an extending direction of the refrigerant channel 132, and the filling hole 131 is connected to a sidewall of the refrigerant channel 132.

Then, the refrigerant channel 132 communicates the injection pipe 13 and the injection hole 11 through the filling hole 131, and the filling device 2 is disposed in the filling hole 131 to control the on/off of the refrigerant channel 132, so as to communicate or block the injection hole 11 and the injection pipe 12.

Further, as a preferred implementation scheme, the filling channel 13 is disposed in the cylinder 10 along a height direction of the cylinder 10, one end of the injection hole 11 is communicated with the filling channel 13, the other end is communicated with a compression cavity of the cylinder 10, and the injection hole 11 is disposed on an inner wall 14 of the cylinder 10. One end of the sealing body 21 seals one end of the filling hole 131 and one end of the refrigerant channel 132, and the other end of the sealing body 21 is located in the filling hole 131; the sealing body 21 plays a role of sealing one end of the charge hole 131 and one end of the refrigerant channel 132 in both the injection and the backflow of the refrigerant. Since the refrigerant channel 132 is disposed in the cylinder 10, the other end thereof can be sealed by a cylinder cover of the cylinder 10; because the sealing body 21 is disposed near one end of the injection hole 11, when the refrigerant flows back, the refrigerant flowing back through the injection hole 11 and entering the filling hole 131 directly impacts the sealing body 21, thereby avoiding impacting the on-off element.

Because the other end of the sealing body 21 is located in the filling hole 131, in order to realize that the refrigerant channel 132 communicates with the injection pipe 12 and the injection hole 11 through the filling hole 131, the other end of the filling hole 131 communicates with the injection pipe 12, and the side wall of the refrigerant channel 132 communicates with the injection hole 11, because the sealing body 21 is disposed near one end of the injection hole 11 (the left end of the injection hole 11 in fig. 1), the sealing body 21 is also near the communication position of the refrigerant channel 132 and the injection hole 11, and the refrigerant jetted out through the injection pipe 12 enters the filling hole 131, enters the refrigerant channel 132 through the filling hole 131, then enters the injection hole 11, and finally enters the compression cavity of the cylinder 10.

Of course, in order to improve the passing efficiency of the refrigerant channel 132, the refrigerant channel 132 may further include two channels, namely a first channel and a second channel, which are oppositely disposed at the side of the filling hole 131, wherein the side wall of the first channel is communicated with the injection hole 11. In the same way, three, four or more refrigerant channels can be arranged to increase the passing efficiency of the refrigerant channels. The cross section of the refrigerant can be set to be in a shape of circle, ellipse, polygon or the like.

The on/off element is connected to the other end of the sealing body 21, and the sealing body 21 is in interference with the filling passage 13, whereby the sealing body 21 substantially seals the on/off element in the filling hole 131.

Although an interference fit is used in the present embodiment to achieve a fixed seal between the sealing body 21 and the filling channel 13, it is easily understood by those skilled in the art that other sealing connection methods, such as a threaded sealing connection, can also be used to achieve a fixed seal between the sealing body 21 and the filling channel. The threaded sealing connection has the advantage of facilitating later disassembly and maintenance.

In order to open and close the injection hole 11 and the injection pipe 12 by means of an on-off element, as a preferred embodiment: the on/off element may include a valve core 22 and an elastic element, the valve core 22 is connected to one end of the elastic element, the elastic element needs to provide elastic force to the valve core 22, and the elastic element provides elastic force to the valve core in the charging hole 131, so the elastic element may be a spring 23. In order to make the connected spring 23 more stable, therefore be equipped with one on the case with spring 23 assorted shrinkage pool, cover through this shrinkage pool in the one end of spring 23, in order to improve the relative stability between case 22 and the spring 23, guarantee when injection pipe 12 does not spout the refrigerant, case 22 can block the jet orifice 11 with intercommunication between the injection pipe 12, in order to pass through case 22 more effectively realize the jet orifice 11 with intercommunication or block between the injection pipe 12, still be equipped with a diameter between the injection pipe with fill and annotate the other end in hole a diameter is less than fill the intercommunicating pore 121 in hole 131 diameter for with injection pipe 12 with fill the other end intercommunication in hole 131.

Then, the other end of the elastic element is connected with the other end of the sealing body 21, the valve core 22 can move along the filling channel to communicate or block the injection hole 11 with the injection pipe 12, when the injection pipe 12 injects the refrigerant, the valve core 22 overcomes the elastic force of the spring 23 under the pressure of the refrigerant, and moves towards the outlet direction of the refrigerant sprayed from the injection pipe 12, so as to communicate the injection pipe 12 with the injection hole 11; when the injection pipe 12 stops injecting the refrigerant, the valve core 22 moves to return to the original position under the action of the spring 23, and blocks the communication hole 121 for communicating the other end of the injection hole 131 with the injection pipe 12, so as to block the communication between the injection pipe 12 and the injection hole 131, and further block the communication between the injection pipe 12 and the injection hole 11.

When the refrigerant flows back from the compression cavity of the cylinder 10, the valve core 22 blocks the injection pipe 12 from the injection hole 11 under the action of the spring, so that the returned refrigerant cannot enter the injection pipe 12. Since one end of the injection hole 11 is close to the sealing body 21, as shown in fig. 1, the left end opening of the injection hole 11 is located on the right side of the sealing body 21, the refrigerant flowing back from the injection hole 11 into the filling hole 131 directly impacts the sealing body 21, and thus directly impacts on the on-off element located at the lower portion of the sealing body 21, that is, the valve element 22 and the spring 23.

Further, since the included angle between the injection hole 11 and the sealing body 21 may affect the impact effect of the refrigerant, if the left end opening of the injection hole 11 in fig. 1 is lower than the right end opening, the backflow refrigerant still may have a slight impact on the spring 23, and if the left end opening of the injection hole 11 is higher than the right end opening, the refrigerant is not favorable to normally enter the compression cavity of the cylinder 10, so as to serve as an optimal scheme: the linear direction formed by the sealing body 21, the spring 23 and the valve body 22 in this order is perpendicular to the extending direction of the injection hole 11. By the arrangement, the backflow refrigerant can impact the sealing body 21 at a vertical angle, so that the direct impact on the spring is avoided, and the stability and reliability of the enhanced vapor injection compressor are improved.

For a more clear explanation of the present invention, the process of the present invention during the injection of air (the injection of refrigerant) and the return of refrigerant will be described below with reference to fig. 1 again:

when the air is injected, the refrigerant impacts the valve core 22 through the injection pipe 12, when the pressure applied to the valve core 22 is greater than the elastic force of the spring 23, the valve core 22 rises, the refrigerant enters the filling hole 131, and the side wall of the refrigerant channel 132 is connected with the side wall of the filling hole 131, so that the refrigerant entering the filling hole 131 enters the refrigerant channel 132, the side wall of the refrigerant channel 132 is connected with the injection hole 11, and the refrigerant then enters the compression cavity of the cylinder 10 through the injection hole 11;

after the air is injected through the air injection pipe 12, and along with the operation of the enhanced vapor injection compressor, the pressure in the air cylinder 10 is gradually increased, when the pressure in the air cylinder 10 is sufficiently high, the refrigerant in the air cylinder 10 starts to flow back and impacts the side surface position, close to the lower end of the sealing body 21, beside the injection hole 11, further, the valve core 22 is impacted downwards along the gap of the spring in the filling hole 131, the position of the valve core 22 is lowered under the action of the elastic force of the spring 23 and the backflow refrigerant until the valve core 22 reaches the other end of the filling hole 131, the backflow path of the refrigerant is blocked, and the refrigerant is prevented from flowing back into the injection pipe 12.

In the above process, neither the refrigerant injected through the injection pipe 12 nor the refrigerant flowing back through the injection hole 11 directly impacts the spring 23, so the above solution solves the technical problem of the present invention and achieves the corresponding technical effect.

In addition, some of the enhanced vapor injection compressors have more than one cylinder 10, and therefore, although the above embodiments do not show an embodiment with a plurality of cylinders 10, it is also easy to understand by those skilled in the art that, no matter the enhanced vapor injection compressor has several cylinders 10, the solution provided by the present invention can still be applied, for example, when the enhanced vapor injection compressor has two cylinders 10 in an up-down structure, corresponding filling devices 2 can be disposed in both cylinders 10, as shown in fig. 4, which is a partial structural schematic diagram of symmetrically disposing the filling devices in an up-down structure.

The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.

Claims

1. A compressor comprises at least one cylinder with an injection hole, an injection pipe and a filling channel communicated with the injection hole and the injection pipe, and is characterized by further comprising a filling device arranged in the filling channel, wherein the filling device comprises an on-off element and a sealing body, the on-off element is used for enabling the injection hole and the injection pipe to be communicated or blocked, the sealing body is connected with the on-off element, one end of the sealing body, close to the injection hole, is arranged and is used for sealing one end, far away from the injection pipe, of the filling channel;

the on-off element comprises a valve core and an elastic element, the valve core is connected to one end of the elastic element, the other end of the elastic element is connected with the other end of the sealing body, and the valve core can move along the filling channel to enable the injection hole to be communicated with or blocked from the injection pipe;

the linear direction formed by the sealing body, the elastic element and the valve core is vertical to the extending direction of the injection hole in sequence.

2. The compressor according to claim 1, wherein the charge passage is provided in the cylinder in a height direction of the cylinder, and one end of the injection hole communicates with the charge passage and the other end communicates with a compression chamber of the cylinder.

3. The compressor as claimed in claim 1, wherein the filling channel includes a filling hole and a refrigerant channel, the filling hole extends in the same direction as the refrigerant channel, and the filling hole is connected to a sidewall between the refrigerant channels;

4. The compressor as claimed in claim 3, wherein the refrigerant passage includes a first passage and a second passage, the first passage and the second passage being disposed opposite to each other at a side of the charge hole, wherein a sidewall of the first passage communicates with the injection hole.

5. A compressor according to claim 3, wherein a communication hole is provided between the injection pipe and the other end of the charge hole for communicating the other end of the charge hole with the injection pipe.

6. The compressor of claim 5, wherein a diameter of the communication hole is smaller than a diameter of the charge hole.

7. The compressor of claim 1, wherein said seal body is in interference with said charge passage.

8. The compressor of claim 1, wherein said seal body is in threaded sealing engagement with said charge passage.

9. The compressor of claim 1, wherein the valve element has a recess, and one end of the elastic member is disposed in the recess.

10. The compressor of claim 9, wherein said resilient member is a spring.